13.Bxg7 is also possible, but it's so hard for a human to evaluate that I prefer the move played in the game.
10... e6e5 Both 10...Ne7 and 10...Nh6 are good options. 11. d6e5  11... a6b4 This tempting move is a mistake. Black should choose either 11...Ne7 or 11...Nh6. 12. e2f4 The refutation of Black's play. Robson needs a lot of praise to find all this over the board, in a rapid game, with the pressure of being caught in the opening. 12... g6f5 